@mixin ellipsis {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@mixin center($width,$height){
  width: $width;
  height: $height;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -($height) / 2;
  margin-left: -($width) / 2;
}